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A possibility to measure the spin and spin-spin correlations of a charginopair is investigated in the process electron positron -> chargino_1anti-chargino_1 -> (neutralino_1 quark anti-quark) (neutralino_1 quarkanti-quark) at future linear-collider energies. The total and the differentialcross sections are calculated by the GRACE system which allows for the fullspin correlation. Experimental sensitivity of the measurements are examined byassuming the limited detector resolution, the initial state radiation and thebeam-beam effect (beamstrahlung). It is found that generally the spin-spincorrelation can only be measured with a lower sensitivity than the charginospin itself. The dependence of the correlation measurements on the relevantSUSY parameters can be seen for a light sneutrino case, but the situationbecomes worse for a heavier sneutrino.Comment: 23 pages, 7 figures, 6 tables; added reference for section

SPIN AND SPIN–SPIN CORRELATIONS IN CHARGINO PAIR PRODUCTION AT FUTURE LINEAR e+e- COLLIDERS

SPIN AND SPIN–SPIN CORRELATIONS IN CHARGINO PAIR PRODUCTION AT FUTURE LINEAR e⁺e^- COLLIDERS